We are testing our app on several iPhone 6 Pluses, and at some point we are using GPUImage to capture some images. On my device, it works fine, but on my friend's device, it causes app to crash and ...

I recently updated to the GPUImage 0.1.6. A glsl shader that worked correctly with previous versions (and iOS 7) no longer returns an image with the correct alpha channel.
A glsl shader with a pass ...

I have an app that uses GPUImage it has a preview screen (from camera) and a zoom slider which zooms the preview by the slider value. What happens is I have a overlay text within the preview screen ...

In my app I have to play an alpha channel video as an overlay over the current view (I'm planning to achieve this alpha channel video using GPUImageAlphaBlendFilter or GPUImageChromaKeyBlendFilter), ...

The compiler build is successful however during the run , the app crashes whenever the below given code is executed . I have highlighted the area where the thread breaks ( there are no breakpoints in ...

I have a green button with a white icon and title. I am trying to use the GPUImage library that I just learned about to change the green to blue, but keep the white as white. Here is my code:
UIImage ...

'm working on a little app that uses some GPUImage filters. After playing with it for a while I discovered that if I stack too many of those filters, I run into performance issues.
So now I have two ...

I'm working with GPUImage and I wonder that can I apply GPUImageLevelsFilter with custom blending?
For example: the default effect of Levels Filter is normal blending, can we apply another blending ...

I'm facing the following problem using GPUImage:
1st I'm adding a grayscale filter to camera, then I'm using GPUImageAverageColor to get the average colour. The problem is that the colour I'm getting ...

I'm trying to display a GPUImageView with a live camera feed (using GPUImageStillCamera or GPUImageVideoCamera) and display a series of filters below it. When a filter is tapped, I want it to apply ...

NSGarbageCollector was deprecated in OSX 10 when it switched to ARC.
However I have a situation in which ARC is not working properly. I have a GPUImage application which lets me save photos. When I ...

I've had code for over a year that successfully scales, rotates and converts a UIImage to 1bpp (black and white). It works fine on my iPhone 5s, iPads I've tested, etc. However, my iPhone 4 running ...

processing an image into a GPUImageVIew with kGPUImageFillModePreserveAspectRatioAndFill forces the image to fill the entire imageView (which is what I want). However, i allow the user to zoom out by ...

I noticed a lot of people asking questions about linking filters with GPUImage. I can't quite figure out how to do it succinctly. Finally got it working tonight. Just wanted to share my code so people ...

I'm trying to create a GPUImage filter to determine the bounding box of an image. The process would require the following step: copying the image except for:
pixels on last row is black if at least ...

I'm using GPUImage in my photo retouching app for iOS. It works pretty well except I cannot figure out how to get the histogram to create a histogram like that in Photoshop and in a camera. The stock ...

I'm trying to have the live camera feed displayed as greyscale with animated static overlaid.
I have the greyscale working, that was easy, but I'm having trouble figuring out out to overlay an image ...

I'm using GPUImage in my app, and I'm stuck trying to change the brightness and contrast from image.
I created a GPUImageView with a source picture, and set the brightness filter and contrast filter ...

We have an app that mimics the behavior of the Camu app, where filters are masked on top of each other when swiping thorugh them. However, in our app we only do this for already captured images and ...

In our iOS app, using Brad Larson GPUImage, when a user takes a photo or a video, we set the camera input preset to 720x1280.
Once a picture is taken or a movie is recorded, we allow the user to draw ...

I'm trying to write a filter that will only update the frame region when movement has settled in the given region. I decided to tackle this by using 2 image buffers in GPUImage and updating the output ...

I'm having a problem with GPUImage filter. I've created a filter chain an apply it to a image.
Everything went well with my IP5c (7.1). But with my new IP6(8.1), some weird triangle "dot" appeared in ...